Classはincludeできない
class Hoge; end class Fuga include Hoge end
test.rb:4:in `include': wrong argument type Class (expected Module) (TypeError) from t.rb:4:in `<class:Fuga>' from t.rb:3:in `<main>'
class Hoge; end class Fuga include Hoge end
test.rb:4:in `include': wrong argument type Class (expected Module) (TypeError) from t.rb:4:in `<class:Fuga>' from t.rb:3:in `<main>'